forked from OSchip/llvm-project
137 lines
5.9 KiB
LLVM
137 lines
5.9 KiB
LLVM
; RUN: %llc_dwarf %s -o - -filetype=obj | llvm-dwarfdump - | FileCheck %s -implicit-check-not=DW_TAG
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;
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; This tests that we do not create concrete variable DIEs for variables that
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; have no location -- for both ways that LLVM-IR can express a variable with
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; no location. It's possible to:
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; 1) Omit all dbg.values and place the variable in the subprograms retained
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; nodes list,
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; 2) Have a dbg.value with an undef operand, and none with "real" operands.
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; Both of these should produce the same DWARF. In the two functions below
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; (qux and croix) I've modified the IR to represent both scenarios.
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;
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; Original C, LLVM-IR modified afterwards:
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;
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; int foo(int bar) {
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; int baz = 12 + bar;
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; return baz;
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; }
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;
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; int qux(int quux) {
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; int xyzzy = foo(quux);
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; return xyzzy;
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; }
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;
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; int croix(int quux) {
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; int xyzzy = foo(quux);
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; return xyzzy;
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; }
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;
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;; Note the implicit DW_TAG check-not in the FileCheck command line.
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; CHECK: DW_TAG_compile_unit
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;;
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;; First subprogram is attached to the plain "foo" function in the output
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;; object. It should have locations for the two variables in the function,
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;; let's be non-specific as to how.
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_AT_abstract_origin (0x{{[0-9a-f]*}} "foo")
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; CHECK: DW_TAG_formal_parameter
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; CHECK: DW_AT_location
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; CHECK: DW_TAG_variable
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; CHECK: DW_AT_location
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;
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;; Abstract subprogram; should have plain variable declarations
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_AT_name ("foo")
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; CHECK: DW_TAG_formal_parameter
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; CHECK: DW_AT_name ("bar")
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; CHECK: DW_TAG_variable
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; CHECK: DW_AT_name ("baz")
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;
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; CHECK: DW_TAG_base_type
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;
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;; The copy of "foo" inlined into "qux" should have no children.
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_AT_name ("qux")
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; CHECK: DW_TAG_formal_parameter
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; CHECK: DW_TAG_variable
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; CHECK: DW_TAG_inlined_subroutine
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; CHECK: NULL
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;
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;; Same for the copy of foo inlined into "croix"
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; CHECK: DW_TAG_subprogram
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; CHECK: DW_AT_name ("croix")
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; CHECK: DW_TAG_formal_parameter
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; CHECK: DW_TAG_variable
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; CHECK: DW_TAG_inlined_subroutine
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; CHECK: NULL
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; Function Attrs: norecurse nounwind readnone uwtable willreturn
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define dso_local i32 @foo(i32 %bar) local_unnamed_addr !dbg !7 {
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entry:
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call void @llvm.dbg.value(metadata i32 %bar, metadata !12, metadata !DIExpression()), !dbg !14
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%add = add nsw i32 %bar, 12, !dbg !15
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call void @llvm.dbg.value(metadata i32 %add, metadata !13, metadata !DIExpression()), !dbg !14
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ret i32 %add, !dbg !16
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}
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; Function Attrs: norecurse nounwind readnone uwtable willreturn
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define dso_local i32 @qux(i32 %quux) local_unnamed_addr !dbg !17 {
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entry:
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%add.i = add nsw i32 %quux, 12, !dbg !24
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ret i32 %add.i, !dbg !25
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}
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; Function Attrs: norecurse nounwind readnone uwtable willreturn
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define dso_local i32 @croix(i32 %quux) local_unnamed_addr !dbg !26 {
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entry:
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call void @llvm.dbg.value(metadata i32 undef, metadata !28, metadata !DIExpression()), !dbg !30
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call void @llvm.dbg.value(metadata i32 undef, metadata !12, metadata !DIExpression()), !dbg !31
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%add.i = add nsw i32 %quux, 12, !dbg !33
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call void @llvm.dbg.value(metadata i32 undef, metadata !13, metadata !DIExpression()), !dbg !31
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call void @llvm.dbg.value(metadata i32 undef, metadata !29, metadata !DIExpression()), !dbg !30
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ret i32 %add.i, !dbg !34
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}
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; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: ".")
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!2 = !{}
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!3 = !{i32 7, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang"}
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!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12, !13}
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!12 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 1, type: !10)
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!13 = !DILocalVariable(name: "baz", scope: !7, file: !1, line: 2, type: !10)
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!14 = !DILocation(line: 0, scope: !7)
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!15 = !DILocation(line: 2, column: 16, scope: !7)
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!16 = !DILocation(line: 3, column: 3, scope: !7)
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!17 = distinct !DISubprogram(name: "qux", scope: !1, file: !1, line: 6, type: !8, scopeLine: 6, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !18)
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!18 = !{!19, !20}
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!19 = !DILocalVariable(name: "quux", arg: 1, scope: !17, file: !1, line: 6, type: !10)
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!20 = !DILocalVariable(name: "xyzzy", scope: !17, file: !1, line: 7, type: !10)
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!21 = !DILocation(line: 0, scope: !17)
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!22 = !DILocation(line: 0, scope: !7, inlinedAt: !23)
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!23 = distinct !DILocation(line: 7, column: 15, scope: !17)
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!24 = !DILocation(line: 2, column: 16, scope: !7, inlinedAt: !23)
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!25 = !DILocation(line: 8, column: 3, scope: !17)
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!26 = distinct !DISubprogram(name: "croix", scope: !1, file: !1, line: 11, type: !8, scopeLine: 11, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !27)
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!27 = !{!28, !29}
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!28 = !DILocalVariable(name: "quux", arg: 1, scope: !26, file: !1, line: 11, type: !10)
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!29 = !DILocalVariable(name: "xyzzy", scope: !26, file: !1, line: 12, type: !10)
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!30 = !DILocation(line: 0, scope: !26)
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!31 = !DILocation(line: 0, scope: !7, inlinedAt: !32)
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!32 = distinct !DILocation(line: 12, column: 15, scope: !26)
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!33 = !DILocation(line: 2, column: 16, scope: !7, inlinedAt: !32)
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!34 = !DILocation(line: 13, column: 3, scope: !26)
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